This plugin outputs some info to a LCD display. So, to this plugin work properly, you need a LCD and the linux daemon lcdproc (http://lcdproc.sourceforge.net/).
If for some reason you want (or have to) use LCDproc-0.5 (at the time of this writing, the CVS version), you should first patch the freevo source (actually just the LCD plugin source) with http://www.muresan.de/freevo/freevo-1.5.4_lcdproc.diff
To activate this plugin, just put the following line at the end of your local_conf.py file:
plugin.activate( 'lcd' )